Safety device for rotating tools



12, 1932. 1 A. M. DEGNER SAFETY DEVICE Fon noTA'TI'NG ToroLs Filed- Eeb.2e, 19,31

' /NvE/ram M A56/VER Patented Jan. 12, Y i. i y *n C ALBIN' M.,nEGrN'nn.,po ig.-ro1.nno,`oiiiofnssrnonlisunrncn corinusrronConronfni- 'rior-r,l or romeno, onro, A cpnronnrrenponnnw gamew t iApplicationniea February z'eieei; sr'iain; 518.31221` V f 1' Thisinvention relatesto a safety device for and; 6Lv lhey plunger `isnormally heldv ,inl ref rotatable collapsible taps and like toolswhichtraotedpositionby@l spring-125,' the upper end are reset by a radiallyextendingflever carv.of...whichen'ga-gesthe'underside oa nut-,.27 riedby the body of the tap. The operator kca-rrie'dbytheupper.endpfthefplunger7 and i@ will frequently attempt to reset the tapwhile Iahy,uvhichithecutters a "e heldldrawn illtothe i it is rotatingespecially when the tap is ibodylliaisiiicnt'diStanCe'tQ clearheWOlkmounted in a drill press spindle. This :is'az`The'.handle;fordepressingthe plungenis dangerous proceeding since theoperato1"s ishowilfafs afk laterally extending levll 29, pir* sleeve isliable to become entangled in the ot-,cdas at;ln-fijcollarmnd havingenen--y "fm lever with serious consequences to the operatending iingerv35;,tl'1e kend-.of which projectso tor as will be readily appreciated.inta Suitable Vhole O11. cavity?? nyihe. lOOdy In accordance with thepresent invention, e 11. Thercollar 3.3is-in'sliding. relationtoY a thetool is encircled by a ring which is pivsleeve/.or ring)l slidableonthebody lland otally mounted on thebody of the tool, the #Which-.is`})rovded Witheet-i iiangefl against 15 ring being coupled to theextending end of the "which lthe collar 33 bears. `fxThe sleeve 39 'isfy5 actuating lever, the arrangement being such coupled to theplungrlbymeanso'ff aftransthat when the ring is tiltedthe lever will be-yelsely arranged couplinglbar 43 `asis clearly actuated. Y Y :shown inl5, itbeing notedfthat `the.body n Referring to the accompanyingdrawings, .11; 1S provi-dedwithal diametricclearance slot 20 formingpart of this speciiication, 45 longrenoughfto permit-the,plunger andf-'nFig. 1 is a perspective'view oi a well known f sleeveto; hvefa con] ointmovement sufficient type of collapsing tap and showing the presto expandY or collapse gthei"cutters when `the i ent invention applied thereto, y`lever.' 29"is actuated. l :'.1 V Fig. 2 is an enlarged vertical crossVsection morder Lto-.hold the cutte'rsi'nvexpanded 'i l25 taken on line2-2 of Fig. 1; ,or setfpositionthereis provideda segmental 75 Fig. 8 isa side elevational view of thel dedetent 4i? locatedfwithinatralnsverseslotprovice shown in Fig. l.; 'e videdin thetwall'fo-f theisleeve 39.VThis de`y Fig. l is a view partly in section andpartl'ytentfislnormallyzheld pressed -againstth'e 1inin elevation of the deviceshownin Fig. 1, the ner.' wallof 4arrfannular Han-ge ,49," dependingjv1m30 section being taken on line 4-4 of Fig. 3; ironia ri``g51;;adjustablyamounted'on thel 'so Fig. 5 is atransverse section takenonline body11by asmallsp'ring "53? located ineach f 5-5 of Fig. 2; end0fth`edetent,the iiangevextendinginto an f Fig. 6 is a transversesection takenVA on line annular spacefo'rmedbetweenthezupper ends 6 6 ofFig. 2, and Y yofthe'rsleever) yIa'nilccllar 33.- 1 Y The bottom` tionillustrating the arrangement of parts i'Giiainfer'andthebottomofthespaceiinwhi'ch shown in Fig. 2 in locking relationship. 'f sthe .flangeproects 1s formed'witlr abevelj,so- In the drawings, 11 designates a tapbody f thatffaiiterethe sleeve B9 has been depressed l having anintegral tapered shank 13 for in- SUiiClSltly5a-Set*fthe'iClltPSih@effliwll Y'40 Sertion in thespndle of a, drillpress,V lathe move outwardlyuntilthe beveled faces abutfo or the like.The body is provided, at its lower aid-,tleldetent eligages4- theunderside ofV the 4 end, with a number of equidistant radial slotsaiiaiigf Qxtiicrebylockmg 4,the cuttersinset 15 for the reception ofcutters `or chasers 17 p-03116191.15 Q -ielesejtliclock and collapsewhich are held in place by aca'p 19iastened .theclit-ters;thercollarisfmoved lipvvarilly,`

' 45 to the bottom face of the body. The cutters .eitlierbyjtheflever291- orsomer other rn'eansf"9f- 50 with the cutters, as is clearly shownin Figs?, s tQOdQJi;

are adapted to be moved inwardly orwoutsothat :the-- beveled *facescofact` with each wardly from the axis of thebodylll, as thel`other,toarrowtl the l`kjletent inwardly aga-inst case may be, byaplunger 21 having a head .=the-.action2ofaspringuntilthe detentjdisen-23 in interlocking and sliding enga-gement gagesthe flange 49, as willbe readily.under-'M1 to operate the handle.

'i In certain types of l vention is in the nature ly collapse thecutters F rom the foregoing description, it will be seen that when theapparatusis revolving, the laterally extending handle or lever 29constitutes a source of danger to the operator, as by catching in hissleeve when he attempts To eliminate this source of danger, the presentinventionprovides a protecting shield or ring which permits theoperation of the lever without danger to the operator.y Y

In accordance with this invention, thereis provided, as shown in Fig. l,a shieldor ring which encircles the apparatus. The ring is pivotallymounted on a pair of laterally extending projections or spokes 57 ofwhich the collar 33 -forms the hub and is suitably attached to the endof l-ever 29 so that when having radially movable cutting elements andmeans including a lever rotatable with the tool for actuating saidelements, of a ring encircling said tool and enclosing the lever andconnected to the outer end of said lever, means projecting from saidtool for pivotally supporting said ringv for rotation with the tool .anda shield carried by said ring.

In testimony whereof I aliix my signature. v' lALBIN M. DEGNER.

the ring is tiltedthe lever will be operated. By providing thev end ofspokes 571'w1th e.

screws 59 andthe end of lever-29 with a screw 6l, all of which extendthrough clearance holes provided in the ring andare screwed into theirrespective sockets until l'lush with the outside periphery of the ring,not only is a relatively simple pivotal mounting, which is easy toassemble, provided, but all danger from-protruding screw heads iseliminated.

` In order to prevent the laterally extending spokes and lever fromcatching the operators ngers when he touches the ring to either set orycollapse'the cutters, there is provided Withein the ring 55 a shield 63.This shie'ldfpreferably comprises. a screen disposed within the ringabove thespoles and lever so as to elfectually prevent them fromcatching the operators lingers without obstructing his view of the work..As-'will be readily appreciated from the foregoing'description, theinof an attachmentfor Y atype of rotating tool now'on the market andhaving a radially extending lever 29.

work done by rotatable Y collapsing tools, it is desirable -toautomatical-v after they have entered the work a desired distance. Tothis end y there is provided a trip plate 65'which is sup- Y ported atthe end of a pair of adjustable arms 67 suitably attached to the collar33. VAs soon as the cutters have 'entered the work the re- .quireddistance, the work engages the trip -fplate and through Vthe arms 67causes the coli i i detent 47,

lar to'move upward and thereby unlatchthe p allowing the cutters-tocollapse as v -has heretofore been,` described.'

What I claim is 1. The combination with aV rotatabletool yhavingradially movable cutting elements f and meansxincluding a leverrotatable with encircling said tool andenclosing the lever and connectedto .and means supported by said tool for pivotally supporting said ringfor rotationwith the tool.V

, the tool foractuating said elements, of a ring f o the vouter end ofsaid lever, l, I

